Step-edge magnetoresistance in La0.7Ca0.3MnO3 films
| Autor: | Pablo Esquinazi, J. Dienelt, G. Heydon, R. Höhne, Michael Ziese |
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| Rok vydání: | 1999 |
| Předmět: |
Spin glass
Materials science Colossal magnetoresistance Physics and Astronomy (miscellaneous) Magnetoresistance Condensed matter physics Conductance Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Pulsed laser deposition Condensed Matter::Materials Science Tunnel magnetoresistance Ferromagnetism Etching (microfabrication) Condensed Matter::Strongly Correlated Electrons |
| Zdroj: | Applied Physics Letters. 74:1481-1483 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/1.123587 |
| Popis: | The magnetoresistance of step-edge structures in La0.7Ca0.3MnO3 films was investigated. Step-edge arrays with 200 steps of height 140–200 nm and step separation 20 μm along [110] were fabricated on LaAlO3 substrates by chemically assisted ion-beam etching. Thin La0.7Ca0.3MnO3 films were deposited on the structured substrates by pulsed-laser deposition. Measurements of the large low-field magnetoresistance, the dynamic conductance, and the anisotropic magnetoresistance lead to the proposal of a model of spin-polarized tunneling in a ferromagnet/spin-glass/ferromagnet geometry. |
| Databáze: | OpenAIRE |
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